-er a-a a-c a-t a-z aaa aac aae aak aar aat aaz ac- aca acc ace ack acr act acz aea aec aee aek aer aet aez aka akc ake akk akr ar- ara arc are ark arr art arz at- ata atc ate atr att atz az- aza aze azt azz c-- caa cac cae cak car cat caz cca ccc cce cck ccr cct ccz ce- cea cec cee cek cer cet cez cka ckc ckt cra crc cre crk crr crt crz cta ctc cte ctk ctr ctt ctz cz- czc cze czk czt eaa eac eae eak ear eat eaz ec- eca ecc ece eck ecr ect eea eec eee eek eer eet eka ekc eke ekr ekt era erc ere erk err ert erz eta etc ete etk etr ett etz eze ezr ezz k-t k-z ka- kaa kac kae kak kar kat kaz kca kcc kce kck kcr kct ke- kea kec kee kek ker ket kez kkc kke kkk kkr kkt kra krc krk krr krt kta ktc kte ktk ktr ktt ra- raa rac rae rak rar rat raz rca rcc rce rcr rct re- rea rec ree rek rer ret rez rkc rke rkk rkt rkz rra rrc rrk rrr rrt rta rtc rte rtk rtr rtt rtz rza rze taa tac tae tak tar tat taz tca tcc tce tck tcr tct te- tea tec tee tek ter tet tez tka tkc tke tkk tkr tkt tkz tra trc tre trk trr trt trz tta ttc tte ttk ttr ttt tza tze zaa zac zak zar zat zaz zce zea zec zee zek zer zet zez zka zta zte ztr zzr zzt zzz